java金额元与分转换工具类
java金额元与分转换的一个工具类。
1.元转分：
可传入字符串或者long型（隐式转换为long型也可）整数。
若传入为字符串，则通过替换小数点的方式转换，小数点有多位或者没有小数点皆已考虑。
若传入为long 则通过BigDecimal来乘100
2.分转元：
可传入字符串或者long型（隐式转换为long型也可）整数。并对传入的分进行粗略的格式判断
详见代码：
package com.util;import java.math.BigDecimal;/** * com.util.AmountUtils * @description 金额元分之间转换工具类 * @author zcm0708@sina.com * @2012-2-7下午12:58:00 */public class AmountUtils {/**金额为分的格式 */public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";/** * 将分为单位的转换为元并返回金额格式的字符串 （除100） * * @param amount * @return * @throws Exception */public static String changeF2Y(Long amount) throws Exception{if(!amount.toString().matches(CURRENCY_FEN_REGEX)) {throw new Exception("金额格式有误");}int flag = 0;String amString = amount.toString();if(amString.charAt(0)=='-'){flag = 1;amString = amString.substring(1);}StringBuffer result = new StringBuffer();if(amString.length()==1){result.append("0.0").append(amString);}else if(amString.length() == 2){result.append("0.").append(amString);}else{String intString = amString.substring(0,amString.length()-2);for(int i=1; i<=intString.length();i++){if( (i-1)%3 == 0 && i !=1){result.append(",");}result.append(intString.substring(intString.length()-i,intString.length()-i+1));}result.reverse().append(".").append(amString.substring(amString.length()-2));}if(flag == 1){return "-"+result.toString();}else{return result.toString();}}/** * 将分为单位的转换为元 （除100） * * @param amount * @return * @throws Exception */public static String changeF2Y(String amount) throws Exception{if(!amount.matches(CURRENCY_FEN_REGEX)) {throw new Exception("金额格式有误");}return BigDecimal.valueOf(Long.valueOf(amount)).divide(new BigDecimal(100)).toString();}/** * 将元为单位的转换为分 （乘100） * * @param amount * @return */public static String changeY2F(Long amount){return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();}/** * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额 * * @param amount * @return */public static String changeY2F(String amount){String currency = amount.replaceAll("\\$|\\￥|\\,", ""); //处理包含, ￥ 或者$的金额int index = currency.indexOf(".");int length = currency.length();Long amLong = 0l;if(index == -1){amLong = Long.valueOf(currency+"00");}else if(length - index >= 3){amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));}else if(length - index == 2){amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);}else{amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");}return amLong.toString();}public static void main(String[] args) {try {System.out.println("结果："+changeF2Y("-000a00"));} catch(Exception e){System.out.println("----------->>>"+e.getMessage());//return e.getErrorCode();} //System.out.println("结果："+changeY2F("1.00000000001E10"));System.out.println(AmountUtils.changeY2F("1000000000000000"));System.out.println(Long.parseLong(AmountUtils.changeY2F("1000000000000000")));System.out.println(Integer.parseInt(AmountUtils.changeY2F("10000000")));System.out.println(Integer.MIN_VALUE);long a = 0;System.out.println(a);}}